Year	US Dollars
1990	-413520099.61392
1991	-231788079.4702
1992	-1130348750.92753
1993	-671551677.273
1994	-1291083869.66566
1995	-453217353.07058
1996	-589403825.15908
1997	-931432909.44123
1998	-746158484.34168
1999	-533144288.70571
2000	-509756430.41098
2001	-463837916.06368
2002	-447236872.06813
2003	-582108123.22319
2004	-852171066.3606
2005	-1142378220.33431
2006	-1870603459.89665
2007	-2720720502.84346
2008	-3810825529.91682
2009	-2066650882.96917
2010	-2073211131.68378
2011	-2674972605.98873
2012	-3113483982.31696
2013	-2090483106.8895
2014	-2893508636.80127
2015	-2453386418.71943
2016	-2260384459.37381
2017	-1782327116.95557